L02_GravTheoryMeasurement-page5

L02_GravTheoryMeasurement-page5 - cementation, porosity,...

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Applied Geophysics – Gravity theory and measurement Rock density Mass = Density x Volume Lateral variations in rock density result in gravity anomalies that can be measured at the surface Applied Geophysics – Gravity theory and measurement Factors influencing rock density Unconsolidated sediments – composition, porosity, saturation Sedimentary rocks – composition, age and depth of burial (compaction),
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Unformatted text preview: cementation, porosity, pore fluid Igneous rocks composition (esp. silica content), crystal size, fracturing (i.e. porosity) Metamorphic rocks composition (esp. silica content), metamorphic grade, fracturing (i.e. porosity) Porosity and pore fluid content are probably the most important factors affecting density in the shallow sub-surface...
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This note was uploaded on 01/07/2012 for the course PHYSICS 384 taught by Professor Wei during the Spring '09 term at SUNY Stony Brook.

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